Circuit breaker box and operator with improved lever and interlock means



Aug. 8, 1967 M, 3I ZAVERTMK ET AL 3,335,238

CIRCUIT BREARER Box AND OPERATOR WITH IMPROVED LEVER AND INTERLOCR MEANS5 Sheets-Sheet Filed May 25, 1966 30 {0f/W7 100 fo//oa H2 /117 /oz 6m ceF Hons m 5. www www e 2W L Juif. M wwmf rMen im VHJC NM BVM 149 4a /50um f49\ 147 IQ@ Aug. 8, 1967 CIRCUIT ERE IMPROVEO Filed May 25, 1965 MG. ZAVERTNIK ET AL AKER BOX AND OPERATOR WITH LEVER AND INTERLOCK MEANS.3 Sheets-Sheet gQl-l 3,335,238 CIRCUIT BREAKER BOX AND OPERATOR WITHIMPRUVED LEVER AND INTERLCK MEANS Marshall G. Zavertnik, Manchester,Grace F.. Horst, St. Louis, Joseph J. Farina, Bridgeton, George Liune,Florissant, and Charles E. Williams, Rock Hill, Mo., assiguors toKillark Electric Manufacturing Company, St. Louis, Mo., a corporation ofMissouri Filed May 25, 1966, Ser. No. 552,957 Claims. (Cl. 200 50) Thisinvention relates to a circuit breaker box and operator which providesprotection against hazardous gas and dust and which is waterproof andsubmersion-proof.

In general, this circuit breaker box and operator comprises a housinghaving a cover which may be hinged or otherwise fastened to the housing.An apparatus for mounting a circuit breaker and disconnect switches andan assembly for operating the circuit breaker are contained within thehousing. An operating handle is located on the external side of thecover, and there are operating connections from the handle which arealternately engageable and disengageable with the operating assembly.

The mounting apparatus and operating assembly are designed toaccommodate many different kinds and sizes of circuit breakers. Themounting assembly includes a mounting pan to which the circuit breakeris mounted, and the mounting pan is attached to the back wall of thehousing in such a way that its position can be varied, depending uponthe kind of circuit breaker being operated.

The operating assembly is mounted on a base plate that fastens to themounting bolts which mount the circuit breaker to the mounting pan. Thelbase plate has lugs with a plurality of holes in it for selectivelocation of the operating assembly relative to the face of the circuitbreaker so that the part of the operating assembly that engages thetoggle of the circuit breaker is properly aligned. In the operatingassembly, there is a trip lever that is guided by crank pins in verticalsliding movement. The Circuit breaker toggle projects through arectangular opening in the trip lever, and when the trip lever slides,the edges of the opening engage the trip lever and ip it between on, ofitrip and reset positions. The trip lever is slid upon rotation of acrank arm. The crank arm is rotated when a shaft connected to theoperating handle on the outside of the housing cover is properly locatedin slots in a shaft locator and is rotated. The crank arm ispermanentlyattached to the shaft locator.

The shaft is properly positioned relative to the shaft locator only whenthe cover is closed, and a special interlock prevents opening or closingthe cover unless certain slots in the interlock are aligned with theslots in the shaft locator, and these slots are aligned only when theoperating mechanism and the circuit breaker toggle are in the off ortrip positions. Therefore, the weatherproof and hazardous gas and dustprotected housing cannot be opened unless the circuit breaker is off ortripped.

The general object of theinvention is to provide a circuit breaker lboxand operator having the foregoing characteristics and advantages.Important particular objects are to provide a circuit breaker box andoperator that is waterproof and protected against hazardous dust andgases and externally located operating handle and a toggle operatingassembly, with a special interlock in the positive engagement to preventopening the housing unless the circuit breaker is switched oi ortripped.

l United States Patent O that has positive engagement between an Anotherimportant object of the invention is to provide a circuit breaker boxand operator with a mounting pan for supporting the circuit breaker andwith an operating assembly for operating the circuit breaker from anexternally located handle, wherein the mounting pan and the operatingassembly are adjustable for adjustably mounting different kinds, shapesand sizes of circuit breakers, and wherein the shaft connection betweenthe operating assembly and the operating handle is adjustable toaccommodate different circuit breakers. An object is to provide a lockfor the adjustable shaft which locks the shaft in the selected positionagainst both longitudinal sliding and rotation relative to the operatinghandle, with a minimum number of parts.

Another object of the invention is to provide a circuit breaker box andoperator wherein the operating assembly for the circuit breaker iswithin the housing or box and the operating handle is outside thehousing with adjustable shaft connections between the handle and theoperating assembly, and wherein the handle and the means for mountingthe handle to the cover of the housing and the shaft provideweathertight and hazardous gas and dust protected connections.

Another object of the invention is to provide a circuit breaker box andoperator with an operating assembly for preventing opening of the boxunless the circuit breaker is in the olf or tripped position, whe-reinthe operating assembly is operated by an operating handle locatedoutside the box to apply a lever action to a trip lever, and wherein thetrip lever operates the circuit breaker toggle with onlysingle-direction forces applied to the toggle.

Other objects and advantages will be apparent to those skilled in theart.

As shown in the drawings:

FIGURE l is a front elevation view of the circuit breaker box andoperator;

FIGURE 2 is a side elevation view of the circuit breaker box andoperator with parts broken away and shown in section;

FIGURE 3 is a fragmentary front elevation view of the circuit breakerbox and operator with the access door shown opened and a typical circuitbreaker shown installed for operation;

FIGURE 4 is a fragmentary enlarged view in section taken along the line4 4 of FIGURE 2, particularly showing some of the mounting parts for thecircuit breaker and showing the circuit breaker in the oif position;

FIGURE 5 is a fragmentary view in section taken along the line 5 5 ofFIGURE 4;

FIGURE 6 is a fragmentary view in section similar to that of FIGURE 4but showing the circuit breaker in on position;

FIGURE 7 is a view in section taken .along the line 7 7 of FIGURE 6;

FIGURE 8 is an enlarged view in section taken along the line 8 8 ofFIGURE l;

FIGURE 9 is an enlarged fragmentary view in section taken along the line9 9 of FIGURE l;

FIGURE 10 is a view in section taken along the line 10 10 of FIGURE 9; I

FIGURE l1 is a fragmentary view in section taken along the line 1I 11 ofFIGURE 6;

FIGURE l2 is an enlarged side elevation view of a portion of theoperating shaft;

FIGURE 13 is a view in section taken along the line 13 13 of FIGURE 12;

FIGURE 14 is an enlarged top plan view of another portion of theoperating shaft;

FIGURE 15 is a side elevation view of the portion of the operating shaftshown in FIGURE 14, with parts broken away and shown in section;

FIGURE 16 is an enlarged top plan view of the interlock;

FIGURE 17 is a view 17--17 of FIGURE 16;

FIGURE 18 is a view in section taken along the line 18-18 of FIGURE 16;

FIGURE 19 is an enlarged side elevation view of the trip lever;

FIGURE 20 is an end elevation view of the trip lever as viewed from theleft side of FIGURE 19;

FIGURE 21 is a side elevation view of the mounting plate of the internalmechanism;

FIGURE 22 is a top plan view of the shaft locator;

FIGURE 23 is a view in section taken along the line 23-23 of FIGURE 22;and

FIGURE 24 is a vieW in section taken along the line 24-24 of FIGURE 22.

Referring now to the drawings, this circuit breaker box and operatorcomprises a housing 31 having a back wall 32, side walls 33 and 34, atop wall 35, and a bottom Wall 36. There are mounting lugs 37 and 38welded, bolted or cast to the back wall 32 with appropriate holes andslots-to permit mounting of the box 30 to a Wall. Also, threadedopenings 39 and 40 extend through the top and bottom walls and 36 of thehousing 31 for receiving the threaded ends of co-nduits 41 and 42,respectively, which in turn may carry different electrical conductors tobe attached to a circuit breaker mounted in the housing 31 as will ibedescribed.

The housing 31 has a front wall 43 surrounding a peripheral forwardlyextending flange 44. A front cover 45 is fastened to a side of the frontwall 43 by a piano hinge 46 or other fastener and has a short rearwardlyextending peripheral wall 47 and -outwardly extending peripheral flanges48. A gasket 49 is secured to the cover 45, and, when the cover isclosed against the housing 31, the gasket 49 bears against the flange 44to provide a weathertight and gas and dust tight seal. The cover 45 isfastened tightly to the housing '31 by a plurality of bolts 50 whichmust be removed before the box can be opened.

A handle base 54 is fastened by bolts 55 to the f-ront of the cover 45.The handle base 54 has a forwardly extending annular boss 56 and arearwardly extending sleeve 57 that extends through a hole 58 in thecover 45. There is a bore 59 in the sleeve 57 and a counter bore 60 inthe boss `56. A gasket 61 may be mounted between the handle base 54 andthe cover 45.

A shaft section 63 extends through the bore 59 and has an enlarged head64 positioned in the counter bore '60. The head 64 bears against theshoulder between the bore 59 and the counter bore 60 to restrictrearward movement of the shaft section 63, and a retaining ring 65mounted in 1the shaft section 63 bears against the vsleeve 57 andrestricts forward movement of the shaft section 63. There is a recess 66in the rearward end of the shaft section 63 and another shaft sectionv67 is slidable within the recess 66. A' longitudinal groove 68 isformed in the shaft section 67. The shaft section 63 has two tappedholes 69 spaced 90 apart, as shown in FIG- URE l5, through which a setscrew 69' can be threaded for extension into the groove 68 lto lock theshaft section 67 in place. The shaft section 67 has an enlarged conicalhead 70 at its lower end with a pin 71 extending transversely throughthe head 70. Because of the groove 68, the rotational position of thepin 71 relative to the shaft section 63 is fixed, but the shaft section67 can be slid longitudinally when the setscrew 69 is loosened. Anannular cutout 72 at the base of the head 64 of ythe shaft section 63receives an O-ring 73 to provide water tightness.

in section taken along the line In the head 64 of the shaft section 63,as best seen in FIGURES 14 and 15, there are two tapped holes 75 and 76with counter bores 77 and 78, respectively. A handle 79 has bosses 80and 81 that extend into the counter bores 77 and 78. The handle isfastened to the shaft section 63 'by screws -82 and 83 received incountersunk holes -84 and 85 in the handle 79. A small round plate 186is removably held in a tight fit within a shallow annular cutout 87 tocover the access to the screws 82 and 83.

The handle 79 has a skirt 89 that overlies the annular boss 56. Theskirt 89 does not interfere with free rotation of the handle 79 relativeto the hub 56 but it does provide protection against Water leakage.There are suitable on and off (or trip and reset) indicia 91 and 92 onthe base 54 with a pointer 93 on the handle 79 to indicate the on andolf (or trip and reset) condition of a circuit breaker in the housing31, as will Ibe described. Also, the handle may have a conventionalpadlock lockout (or lock-on, not shown).

A circuit breaker mounting pan is fastened to the back wall 32 of thehousing 31 by two pairs of screws 101 and 102. The screws 101 extendthrough a transverse slot 103 in the mounting pan 100, and the screws102 through a transverse slot 104. When the screws 101 and 102 aretightened, the plate 100 is held firmly in place against the back wall32, but the plate 100 can be adjusted from side to side by loosening thescrews 101 and 102.

Although this circuit breaker operator is designed to accommodate manydifferent kinds and sizes of circuit breakers, as will be describedhereinafter, a typical circuit breaker 105 is shown mounted in thehousing 31. For this mounting, the circuit breaker 105 has four holes106 through its body, each of which receives a hollow metal post 107.Each post 107 has a rearward end 108 and a forward end 109. The rearwardend 108 of each post 107 either bears against the mounting pan 100, orextends to a constriction in the circuit breaker mounting holes 106.Holes 110 are tapped through the mounting pan 100. The holes 110 arelocated by the positions of the posts 107 and are aligned with thepassages through the posts. For each post 107 there is a long screw 111that extends through the post 107 and is threaded into the correspondingtapped hole 110. The circuit breaker 105 has a plurality of terminals112 to which wires, carried by the conduits, are connected.

The internal operating assembly comprises a base plate 116 which has apair of upwardly extending lugs 117 and three downwardly extending lugs118. There are several holes 119 through each of the lugs 117 and 118.Different ones of the holes 119 are aligned with the posts 107 dependingupon the kind and size of circuit breaker 105 to be operated. The longbolts 111 pass through the appropriate holes 119 and into the posts 107to fasten the base plate 116 to the circuit breaker body. The center 120of the base plate 116 is raised toward the cover 45, as shown in FIGURES5 and 7. There is an appropriate slot (not shown) through the base plate116 through which the toggle 121 of the circuit breaker 105 extends andcan freely operate. A pair of crank pins 122 and 123 are brazed orWelded into the raised central portion 120 of the mounting plate 116.The shaft section 124 and head 125 of each crank pin projects in frontof the base plate 116, as shown in FIGURE 21.

As shown in FIGURE 19, a trip lever 128 is formed in the general shapeshown with a straight side 129 between a pair of upper and lower lugs1'30 and 131. The trip lever 128 has a rectangular opening 132 in it anda long vertical slot 133. A relatively long crank pin 134 is brazed orwelded into the trip lever 128 with its shaft 135 and head 136projecting forwardly therefrom.

The trip lever 128 is mounted to the base plate 116 with its straightedge 129 bearing against the shafts 124 of the crank pins 122 and 123and underlying the heads 125. Another crank pin 138 is threaded into thebase plate 116 with its shaft 139 extending through the slot 133 in thetrip lever and its head 140 overlying the trip lever 128` and extendingbeyond the side edges of the slot 133. The toggle 121 extends throughthe rectangular opening 132.

The central section 120 of the base plate 116 has a round opening 144 init in which an interlock 145 is mounted. As shown in FIGURES 16, 17 and18, the interlock 145 has a cylindrical body 146 with tabs 147 that arebent over and welded to the base plate 116. The interlock 145 also has`a narrow front Wall 148 surrounding an angularly rearwardly extendingflange 149 in which two slots 150 are cut.

A shaft locator 154 is shown in FIGURES 22, 23 and 24. The shaft locatorhas a cylindrical side wall 155 with an outwardly extending rim 156 atits base and an outwardly beveled mouth 157 at its front end. There isan annular shoulder 158 surrounding the beveled mouth 157. Slots 159 and160 are cut in the opposite sides of the shoulder 158, the beveled mouth157, and part of the side wall 155.

The shaft locator 154 fits within the interlock with the shoulder 158overlying the front wall 148 of the interlock.

A compression spring 161 bears against the front wall 148 of theinterlock 145 at one end land against a spring retainer 162 at the otherend. The spring retainer 162 is held in place by a metal snap ring 163that bears against the rim 156 on the shaft locator 154. This springwill allow the circuit breaker to be operated even if the shaft isslightly out of alignment.

A crank arm 164 is welded to the shoulder 158 of the shaft locator 154.As shown in FIGURES 8 and 9, the crank arm 164 has a round hole 165through it with slots 166 and 167 at opposite sides of the hole 165.(See FIG- URES 4 and `6.) The slots 166 and 167 are aligned with theslots 159 and 160 of the shaft locator 154. The crank arm 164 has a longarm 169 with a long slot 170 in it, the sides of which bear against theshaft 135 of the crank pin 134.

Operation This circuit breaker box and operator is designed to operatethe toggle 121 of the circuit breaker 105 between the off position shownin FIGURES 4 and 5 and the on posiiton shown in FIGURES 6- and 7, asWell as trip and reset positions. It is designed to accommodate manydifferent kinds and sizes of circuit breakers 105 that may vary inlongitudinal, lateral and height dimensions, and regardless of whichkind of circuit breaker 105 is to be used, the mounting and operatingapparatus can be adjusted in position to accommodate the circuit breakerfor operation of its toggle 121 without disrupting its waterproof andhazardous dust and gas protection characteristics.

To install the circuit breaker 105, the mounting pan .100 is firstinstalled by fastening the screws 101 and 102 to the back wall 32 of thehousing 31. Before the'screws are tightened, the mounting pan 100 isadjusted laterally for the proper position according to the kind ofcircuit breaker 105 to be operated. If necessary, the holes 110 whichreceive the long bolts 111 may be drilled and tapped in a number ofdifferent positions to accommodate different positions of the bolts 111as determined by the location of the holes 106 through the body of thecircuit breaker 105.

The operating assembly 115 is installed with the circuit breaker 105,and the operating assembly 115 is normally put together at the factoryso that it need not be assembled in the field. This factory assemblyincludes welding the tabs 147 of the interlock 145 to the base plate 20either before or after the crank pins 122 and 123 are installed. Thecrank arm 164 is welded to the shaft locator 154, and the ange end 156of the shaft locator 154 is passed through the interlock 145 until theshoulder 158 seats against the front wall 148 of the interlock. Then thecompression spring 161 is slid over the cylindrical side wall 155 of theshaft locator 154 followed by the spring retainer 162 which can slidepast the annular rim 156 at the back of the shaft locator 154. The snapring 163 is snapped in place to retain the spring 161 and the springretainer 162. Next, the trip lever 128 is positioned against the shaft124 of the crank pins 122 and 123 and the crank pin 138 is installedthrough the slot 133. Installation of the crank pin 134 completes theassembly of the operating assembly 115.

The operating assembly 115 is installed with the circuit breaker 105 bysilding the posts 107 through the holes 106 in the body of the circuitbreaker 105 and positioning the base plate 116 so that selected ones ofthe holes 119 are opposite lthe posts 107 as required to properly Valignthe rectangular opening 132 in the trip lever 128 with the toggle 121 onthe circuit breaker 105. Then the long bolts 111 are tightened inpla-ce. The shapes lof the lugs 117 and 118 permit mounting of differentcircuit breakers in different positions, while permitting wireconnections to the terminals 112 on the circuit breaker 105 withoutremoving the base plate 116.

Once the handle base 54 is mounted to the cover 45 by the bolts 55, theshaft section 63 is slid through the bore 59 -until the enlarged head 64is within the coun-ter bore 60, and the retaining `ring 65 is snapped inplace. The retaining ring 65 prevents longitudinal movement of the shaftsection 63, while the rO-ring 73 provides a water-tight shaft seal. Ifthe shaft -section 67 is too long, its end may be cut. Then the shaftsection 67 is slid within the recess 66 until it projects a properdistance to locate the pin 71 against the bases of the slots 159 and 160of the shaft locator 154 (see lFIGURES 8 and 23). Then, when thesetscrew 69 is tightened within the groove 68 against the shaft section67, the shaft section 67 can neither slide longitudinally nor rotaterelative to the shaft section 63.

It should be noted vthat the two spaced tapped holes 69 for the setscrew69 and the two mounting screws 32 and 83 permit the shaft section 83 andthe handle 79 to 4be rotated in increments of 90 through 360 withoutdisturbing the orientation of the circuit breaker or switch.

With the operating handle 79 fastened in place by the bolts 82 and 83,`and the round plate 86 snapped in place, and with the conductorscarried by the conduits 41 and 42 properly wired to the circuit bre-aker105, the circuit breaker box :and operator 30 is ready for use.

Since the interlock 145 is fixed in position relative to the base plate`116, it 4does not rotate when the shaft locator 154 rotates. The slots159 and 160 in the shaft locator are aligned with the slots 150 in theinterlock 145 only when the toggle 121 of the circuit breaker 105 is inthe down or off or trip position as in FIGURES 4 and 5. Only when theseslots are aligned can the pin 71 on the shaft section 67 pass theinclined flange 149 of Ithe interlock 145. With the slots 159 and 160aligned with the slots 150i, the cover 45 can be closed, at which timethe conical head 70 is guided into the shaft'locator 154 by the beveledmouth 157 as the pin 71 enters the slots 159 and 160. Once the cover 45is closed, Ithe bolts 50 `are tightened in place to provide aweathertight seal and protection against the passage of hazardous gasand dust.

Now the circuit breaker is operated by rotating the operating handle 79outside the housing 31. Rotation of the handle in a counterclockwisedirection as viewed in FIGURE 1 moves the pointer 93 lto ya positionopposite the on indicator on the base 54. Since the pin 71 engages thesides of the slots 159 and 160 of the shaft locator 154, rotation of thehandle 79 and the shaft section 63 and 67 causes the shaft locator 154and the trip -lever 164 which is welded to it, to rotate. Rotation ofthe trip lever 164 causes the sides of the slot `170 to bear against theshaft of the crank pin 134 to slide :the t-rip lever 128 verticallyupwardly. The trip lever 128 is guided in a vertical direction by thecrank pins 122 vshaft locator to rot-ate and 123 and the crank pin 138.The bottom edge of the rectangular opening 132 forces the toggle 121 toIflip to the on position `as illustrated in FIGURES 6` and 7. Clockwiserotation of the handle 79 to the off position reverses this sequence ofoperation to flip the toggle 121 to the off position illustrated inFIGURES 4 and 5. But before the handle is rotated to the off position tmove the toggle to the olf position, the cover 45 cannot be opened. Withthe mechanism in the on position, the slot-s 159 and l160 of the shaftlocator 154 are not yaligne-d with the slots 150 of the interlock 145,and the pin 71 is blocked by the inclined flange 149 from beingwithdrawn from the interlock 145. Therefore, a field operator cannotopen the cover 45 until the mech- `anism is moved to the off positionand the slot-s 159 and 160 are aligned with the slots 150.

Various changes and modifications may be made within the purview of thisinvention as will be readily apparent to those skilled in the art. Suchchanges and modifications are within the scope :and teaching of thisinvention as defined by the claims appended hereto.

What is claimed is:

1. A circuit breaker box and operator comprising a housing forcontaining a circuit breaker or disconnect switch operable between on ortrip and off or reset conditions, means to mount the circuit breaker tothe housing, a circuit breaker operating assembly, means to mount thecircuit breaker operating assembly in the housing in operative relationwith the circuit breaker, a cover for the housing, operating handlemeans mounted on the external side of the cover and adapted tooperatively engage the circuit breaker operatin-g lassembly when thecover is closed, and interlock means between the operating handleassembly and the circuit breaker operating assembly for preventingopening or closing of the cover unless the operating assembly is in aposition corresponding :to an olf condition of the circuit breaker, thecircuit breaker having a toggle movable between positions correspondingto the on and off or trip and reset conditions of the circuit breaker,the operating assembly comprising a shaft locator with operatingconnections between the shaft locator and the circuit breaker toggle toflip the toggle to on and off or trip and reset positions when the shaftlocator is rotated, a slot in the shaft locator, the handle assemblyincluding a handle and a shaft extending through the cover with a pin onthe end of the' shaft for entering the slot on the the shaft locatorwhen the shaft is rotated, the interlock means comprising a memberstationarily mounted on the operating assembly and having a slot whichis aligned with the slot of the shaft locator only when the shaftlocator is `in `a position holding the toggle in the off or tripposit-ion, the interlock having a wall which prevents passage of the pinpast it unless the slots are aligned. v

2. The operating assembly of claim 1 wherein the shaft is adjustable inlength to accommodate different kinds and sizes of circuit breakers.

3. The -circuit breaker box operator of claim 1 wherein the handleassembly includes a handle, a base mounted on the cover for supportingthe handle, the base having an annular boss extending .away from thecover, the handle having a skirt overlying the boss.

4. The circuit breaker box and operator of claim 3 wherein the base hasa sleeve extending through the cover, and the shaft extends through thesleeve, and a retaining ring on the shaft at the base of the sleeve tolock the shaft against axial displacement.

l5. The circuit breaker box and operator of claim 1 wherein the shaftcomprises two sections, one section having a recess in an end thereoffor receiving an end of the other section, the latter section having alongitudinal groove in its side, and a setscrew in the recessed sectionfor entering the `longitudinal groove to lock the shaft sectionstogether.

`6. The circuit breaker box and operator of claim 5 wherein the recessedsection has two tapped holes for selectively receiving the set-screw,and the recessed shaft section being connected to the handle withconnecting means which permit 180 of rotation of the recessed shaftsection relative to the handle, thereby permitting selective setting ofthe handle in increments of rotation through 360 relative to the groovedshaft section.

7. A circuit breaker box and operator comprising a housing forcontaining 1a circuit breaker or disconnect switch operable between onor trip and off or reset conditions, means to mount the circuit breakerto the hou-sing, a circuit breaker operating assembly, means to mountthe circuit breaker operating assembly in the housing `in operativerelation with the circuit breaker, a cover for the housing, operatinghandle means mounted on the external side of the cover and adapted tooperatively engage the circuit breaker operating assembly when the coveris closed, and interlock means between the operating handle assembly andthe circuit breaker operating :assembly for preventing opening orclosing of the cover unless the operating assembly is in a positioncorresponding to an off condition of the circuit breaker, the circuitbreaker having a toggle movable between positions correspon-ding to theon and o or trip and reset conditions of the circuit breaker, theoperating assembly comprising a shaft locator with operating connectionsbetween the shaft locator and the circuit breaker toggle to flip thetoggle to on and off or trip and reset positions when the shaft locatoris rotated, the operating connections between the shaft locator and thetoggle comprising ya trip lever having -camming edges for engagingopposite sides of the toggle, means to guide the trip lever in a singledirection of movement only, parallel to the direction of swinging of thetoggle between its on and off or trip and reset positions, a pinattached to the trip lever, and a crank arm yattached to the shaftlocator `and engageable with the pin to slide the trip lever when thecrank arm is rotated with the shaft loc-ator.

8. The circuit breaker box and operator of claim 7 wherein the guidemeans for the trip lever comprises crank pins having shafts againstwhich straight edges of the trip :lever slide and having heads overlyingedges of the trip lever to retain the trip lever in place.

9. A circuit breaker box and operator comprising a housing forcontaining a circuit breaker or disconnect switch operable between on ortrip an-d off .or reset conditions, means 4to mount the circuit breakerto the housing, a circuit breaker operating assembly, means to mount thecircuit breaker operating assembly in the housing 4in operative relationwith the circuit breaker, a cover for the housing, operating handlemeans mounted on the external side of the cover and adapted tooperatively engage the circuit breaker operating assembly when the coveris closed, and interlock mean-s between the operating handle assemblyand the circuit breaker operating assembly for preventing opening orclosing of the cover unless the operating assembly is in a positioncorresponding to an off condition of the circuit breaker, the circuitbreaker mounting means comprising a mounting pan slidably adjustable inposition on a wall of the housing to which it is mounted foraccommodating different kinds a'nd sizes of' circuit breaker-s.

`10. A circuit breaker box and 4operator comprising a housing forcontaining a circuit breaker or disconnect switch operable between on ortrip and off or reset conditions, means to mount the circuit breaker tothe housing, :a circuit breaker operating assembly, means to mount thecircuit breaker operating -assembly in the housing in operative relationwith the circuit breaker, a cover for the housing, operating handlemeans mounted on the external side of the cover and Iadapted tooperatively engage lthe circuit breaker operating Iassembly when thecover is closed, and interlock means between the operating handleassembly and the circuit breaker operating assembly for preventingopening or closing of ythe cover unless the operating assembly is in aposition corresponding to an off condition of Ithe circuit breaker, theoperating assembly being fastened to the circuit breaker by boltsextending ythrough a base plate of the operating assembly, the baseplate having a plurality of holes lfor selection of ones through whichthe mounting bolts 'are to extend for selective location of theoperating assembly `according to the kind of circuit l breaker lto beoperated.

1 0 References Cited UNITED STATES PATENTS 3,086,092 4/1963 Poulton200-50 ROBERT K. SCHAlEFER, Primary Examiner. R. S. MACON, Examiner.

o I. R. SCOTT, Assistant Examiner.

1. A CIRCUIT BREAKER BOX AND OPERATOR COMPRISING A HOUSING FORCONTAINING A CIRCUIT BREAKER OR DISCONNECT SWITCH OPERABLE BETWEEN "ON"OR "TRIP" AND "OFF" OR "RESET" CONDITIONS, MEANS TO MOUNT THE CIRCUITBREAKER TO THE HOUSING, A CIRCUIT BREAKER OPERATING ASSEMBLY, MEANS TOMOUNT THE CIRCUIT BREAKER OPERATING ASSEMBLY IN THE HOUSING IN OPERTIVERELATION WITH THE CIRCUIT BREAKER, A COVER FOR THE HOUSING, OPERATINGHANDLE MEANS MOUNTED ON THE EXTERNAL SIDE OF THE COVER AND ADAPTED TOOPERATIVELY ENGAGE THE CIRCUIT BREAKER OPERATING ASSEMBLY WHEN THE COVERIS CLOSED, AND INTERLOCK MEANS BETWEEN THE OPERATING HANDLE ASSEMBLY ANDTHE CIRCUIT BREAKER OPERATING ASSEMBLY FOR PREVENTING OPENING OR CLOSINGOF THE COVER UNLESS THE OPERATING ASSEMBLY IS IN A POSITIONCORRESPONDING TO AN "OFF" CONDITION OF THE CIRCUIT BREAKER, THE CIRCUITBREAKER HAVING A TOGGLE MOVABLE BETWEEN POSITIONS CORRESPONDING TO THE"ON" AND "OFF" OR "TRIP" AND "RESET" CONDITIONS OF THE CIRCUIT BREAKER,THE OPERATING ASSEMBLY COMPRISING A SHAFT LOCATOR WITH OPERATINGCONNECTIONS BETWEEN THE SHAFT LOCATOR AND THE CIRCUIT BREAKER TOGGLE TOFLIP THE TOGGLE TO "ON" AND "OFF" OR "TRIP" AND "RESET" POSITIONS WHENTHE SHAFT LOCATOR IS ROTATED, A SLOT IN THE HANDLE LOCATOR, THE HANDLEASSEMBLY INCLUDING A HANDLE AND A SHAFT EXTENDING THROUGH THE COVER WITHA PIN ON THE END OF THE SHAFT FOR ENTERING THE SLOT ON THE SHAFT LOCATORTO ROTATE THE SHAFT LOCATOR WHEN THE SHAFT IS ROTATED, THE INTERLOCKMEANS COMPRISING A MEMBER STATIONARILY MOUNTED ON THE OPERATING ASSEMBLYAND HAVING A SLOT WHICH IS ALIGNED WITH THE SLOT OF THE SHAFT LOCATORONLY WHEN THE SHAFT LOCATOR IS IN A POSITION HOLDING THE TOGGLE IN THE"OFF" OR "TRIP" POSITION, THE INTERLOCK HAVING A WALL WHICH PREVENTSPASSAGE OF THE PIN PAST IT UNLESS THE SLOTS ARE ALIGNED.